#box-1 {width:100%; height:60px; position:fixed; z-index:1}
#box-1_1 {width:1000px; height:60px; position:relative; margin:0 auto; z-index:99}
#box-1_2 {width:50%; height:60px; position:absolute; top:0; right:0; z-index:9}
#content {height:1500px; background:#f5f5f5}
